Michael B. Sheffery is Director at ATHERSYS, INC / NEW (ATHX). They have made 6 open-market trades across 3 companies since 2007, most recently 2012-05-04.
CIK 0001283887
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
6 open-market purchases totalling $21.7M since 2007, never a sale. Across 5 scored buys the stock is down 0.0% at ninety days, and 0.3 points behind the S&P over the same stretch.
5 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 80% | 0% | 0% |
| Avg Move | +0.5% | -0.0% | -0.0% |
| Alpha | +6.3% | -0.3% | -0.3% |
| Scored | 5 | 5 | 5 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SUPN | BUY | 2012-05-04 | 2012-05-07 | $5.00 | $5.5M | -17.4% | -0.2% | -0.2% |
| ATHX | BUY | 2009-03-16 | 2009-03-18 | $0.78 | $126K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2008-05-22 | 2008-05-23 | $2.40 | $643K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2008-05-21 | 2008-05-21 | $2.40 | $312K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2008-05-13 | 2008-05-15 | $2.40 | $120K | +5.0% | +0.0% | +0.0% |
| BVIC | BUY | 2007-06-08 | 2007-06-12 | $5.00 | $15.0M | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.